Replacing A Failed Power Supply Unit - NEC Express5800 Series User Manual

Chapter 2 Preparations
AC POWER LED blinks green when the power cord is connected to either of power supply units and
the other power supply unit's AC POWER LED goes on amber.
When the power cord is connected to it, AC POWER LEDs on both power supply units blink green.
5. Power on the server.
AC POWER LEDs go on green.
6. Confirm, by STATUS LED or on POST screen, that there are no errors related to the power supply units.
See Chapter 3 (1. POST Error Message) in "Maintenance Guide" for details on POST error messages.
If AC POWER LEDs are off, reinstall the power supply units. If the same error occurs, contact with your
sales representative.
1.16.3

Replacing a failed power supply unit

Replace only when the power supply unit fails.
To remove power supply unit, reverse the installation procedure.
Install the new power supply unit taking steps 3 to 6 of "Installation", and confirm that the power supply unit is
installed normally.
102
AC POWER LED
Power supply unit #1
Be sure to observe the following precautions to use the server safely. Failure to
observe the precautions may cause burns, injury, and property damage. For
details, see Safety Precautions and Regulatory Notices.
• Pay attention to electric hazard.
Important
• Do not remove a power supply unit operating normally.
• To maintain the cooling effect in the server, be sure to install the blank cover in the
vacant slot.
Tips
In the redundant power configuration (with two power supply units) and if either one of
power supply units fails, the failing power supply unit can be replaced with the system
power on.
Express5800/R120g-1E User's Guide
Power supply unit #2
CAUTION
1. Installing Internal Options